MEXICO MINISTERIAL U.S. Defense Secretary Chuck Hagel, far left, participates in the second North American Defense Ministerial conference with Secretary of National Defense Gen. Salvador Cienfuegos Zepeda and Naval Secretary Adm. Vidal Francisco Soberon Sanz, Mexico's defense ministers, and Canadian Defense Minister Robert Nicholson in Mexico City, April 24, 2014. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 990519-J-ZJC03-239.jpg Photo Gallery